1. perf shows 95% of CPU time is eaten by _PyObject_Free, not kernel space. 2. This loop is cleary hot: https://github.com/python/cpython/blob/51aa35e9e17eef60d04add9619fe2a7eb938358c/Objects/obmalloc.c#L1816-L1819
I can attach the process by gdb and I confirmed many arenas have same nfreepools. I believe this is not jitter caused from NUMA or something else in cloud. -- Inada Naoki <[email protected]> _______________________________________________ Python-Dev mailing list [email protected] https://mail.python.org/mailman/listinfo/python-dev Unsubscribe: https://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com